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Wyszukujesz frazę "TT" wg kryterium: Temat


Tytuł:
Transmission Electron Microscopy Studies of Kr$\text{}^{+}$-Implanted Silicon
Autorzy:
Morawiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/1931308.pdf
Data publikacji:
1994-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Bg
61.72.Ff
61.72.Qq
61.72.Tt
68.35.Fx
81.40.Gh
Opis:
The structure and the depth distribution of radiation damage caused in ⟨111⟩ Si by high-dose krypton implantations (E$\text{}_{i}$ = 150 keV, T$\text{}_{i}$ = RT, D$\text{}_{1}$ = 5 × 10$\text{}^{15}$, D$\text{}_{2}$ = 1 × 10$\text{}^{16}$ and D$\text{}_{3}$ = 5 × 10$\text{}^{16}$ cm$\text{}^{-2}$) have been investigated using techniques of transmission electron microscopy. Formation of secondary defects (Kr bubbles and microtwins) on subsequent different annealing procedures, i.e. during solid phase epitaxial regrowth of damaged layers by conventional furnace heating and liquid phase epitaxial regrowth by applying laser pulses is compared and discussed.
Źródło:
Acta Physica Polonica A; 1994, 85, 5; 819-824
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Coimplantation on Activation of Er Emission in Si
Autorzy:
Przybylińska, H.
Hendorfer, G.
Jantsch, W.
Palmetshofer, L.
Powiązania:
https://bibliotekanauki.pl/articles/1872856.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
61.72.Tt
Opis:
The results of high resolution photoluminescence studies of erbium implanted silicon are presented. We show that the apparent enhancement of Er emission by coimplantation with light elements is not due to formation of Er-dopant complexes, but rather to Er forming complexes with defects induced by the implantation process alone.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 365-368
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ferromagnetic Resonance in Very Fine Co Particles forming Granular Co-Cu Films
Autorzy:
Dubowik, J.
Kudryavtsev, Yu. V.
Powiązania:
https://bibliotekanauki.pl/articles/1955442.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Tt
76.50.+g
Opis:
Ferromagnetic resonance was investigated in heterogeneous Co-Cu thin films consisting of randomly oriented fine Co particles embedded in Cu matrix. The experimental spectra are modelled using dynamic susceptibility approach assuming a broad distribution in particle sizes and dipolar interactions between particles.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 249-252
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation of MnBi by Mechanical Alloying
Autorzy:
Szlaferek, A.
Wrzeciono, A.
Powiązania:
https://bibliotekanauki.pl/articles/1964615.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Ev
75.50.Kj
75.50.Tt
Opis:
In this report we demonstrate that mechanical alloying is an alternative process to produce the intermetallic compound MnBi. Magnetically MnBi powder is prepared from the elemental powders by mechanical alloying in a planetary ball mill and then solid-state reaction at a relatively low temperature. The MnBi powder was aligned in a magnetic field and isostatic pressed. The X-ray pattern of powder reacted clearly shows the intensity peaks of the MnBi phase. After annealing the magnetization was about 1.0×10$\text{}^{-4}$T m$\text{}^{3}$/kg.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 315-318
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Quality Ni-Fe/Cu Multilayer Films with Antiferromagnetic Coupling
Autorzy:
Stobiecki, F.
Dubowik, J.
Luciński, T.
Szymański, B.
Rohrmann, H.
Röll, K.
Schmidt, M.
Powiązania:
https://bibliotekanauki.pl/articles/1955455.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Tt
76.50.+g
Opis:
We report structural and magnetic properties of Ni$\text{}_{83}$Fe$\text{}_{17}$/Cu multilayer films with various buffer layer and sublayer thicknesses of copper d$\text{}_{Cu}$ and Permalloy d$\text{}_{Py}$ deposited by face-to-face sputtering. The following features prove a good quality of our films: a well-layered structure, complete antiferromagnetic coupling with a low coupling strength (2×10$\text{}^{-5}$ J/m$\text{}^{2}$ for d$\text{}_{Cu}$=1 nm and 10$\text{}^{-6}$ J/m$\text{}^{^2}$ for d$\text{}_{Cu}$=2.1 nm) and a low coercive field which make them attractive for possible applications as giant magnetoresistance sensors.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 277-280
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties in Mn Pure Powder
Autorzy:
Szlaferek, A.
Baszyński, J.
Waplak, S.
Jóźwiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/1964612.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Tt
Opis:
The structural and magnetic properties of deformed powder of Mn obtained by mechanical grinding have been investigated using X-ray diffraction and magnetic measurements. The small values of ferromagnetic moment of Mn after grinding are attributed to the formation of a deformed phase at the surface of grains with enlargement of the interatomic spacings at the grains boundaries.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 311-314
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Tunnelling of Magnetization in Uniaxial Magnetic Clusters
Autorzy:
Dobrovitski, V. V.
Rakhmetov, E. R.
Barbara, B.
Zvezdin, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/1964832.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.45.+j
75.50.Tt
Opis:
In the present paper the uniaxial cluster, such as Mn$\text{}_{12}$, is considered. For explanation of magnetization tunnelling in such a system, we propose to account for vibron excitations of Mn$\text{}_{12}$ cluster; the presence of vibron can reduce the symmetry of the system and create the second-order anisotropy in the basal plane, necessary for tunnelling. Using the fact that the vibron frequency is low in comp arison with magnetic moment precession rate, we calculated the rate of magnetization tunnelling within WKB-approximation using the instanton techniques. The exact analytic instanton solution was obtained for arbitrary values of the external field, uniaxial and transversal anisotropy. We discuss also the mechanisms of quantum oscillations of the parameters of tunnelling.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 473-476
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
AC Susceptibility Measurements in the Investigation of Aggregation in Magnetic Fluids
Autorzy:
Fannin, P. C.
Charles, S. W.
Powiązania:
https://bibliotekanauki.pl/articles/2013237.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Tt
76.20.+q
Opis:
Measurements of the complex, frequency dependent susceptibility, χ(ω)=χ '(ω)-iχ''(ω) of two water based magnetic fluids, over the frequency range 10 Hz to 1 MHz are reported. Plots of the susceptibility components against log[f(Hz)] are found to have approximate Debye-type profiles with the presence of Brownian relaxation being indicated by the frequency, f$\text{}_{max}$, of the maximum of the loss-peaks in the χ''(ω) profiles. Corresponding calculations of particle hydrodynamic radius indicate the presence of aggregation. Frohlich, normal and lognormal distribution functions are used to obtain an estimate of the aggregate size distribution in the samples.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 591-594
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dzieje Tetetki. Cz. 2-3.
Autorzy:
Gwóźdź, Zbigniew (1946- ).
Chloupek, Ireneusz.
Powiązania:
Komandos 2000, nr 4. Dod "Broń & amunicja" - nr 5. Dod. "Broń & amunicja"
Data publikacji:
2000
Tematy:
TT (pistolet) opis i użytkowanie ZSRR
Pistolety maszynowe opis i użytkowanie ZSRR
Opis:
Cz. 2:; Zbigniew Gwóźdź; nr 4. Dod. "Broń & amunicja"; s. 23-24.
Cz. 3:; Ireneusz Chloupek; nr 5. Dod. "Broń & amunicja"; s. 5-8.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths
Autorzy:
Idzikowski, B.
Rössler, U. K.
Handstein, A.
Nenkov, K.
Müller, K.-H.
Powiązania:
https://bibliotekanauki.pl/articles/2013425.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Pa
75.50.Tt
Opis:
Samples of the composition RE$\text{}_{x}$Co$\text{}_{20}$Cu$\text{}_{80-x}$, RE = Sm, Gd or Dy (x = 0, 1, and 3) were produced by melt-spinning and subsequent annealing. The magnetoresistance is negative as in granular Co-Cu, but its values depend on the kind of rare earth element added and on changes in the microstructure induced by thermal annealing. An addition of 1 at.% rare earth metal to Co$\text{}_{20}$Cu$\text{}_{80}$ yields a considerable increase in the magnetoresistance ratio, whereas an addition of 3 at.% causes a decrease. E.g., by addition of 1 at.% Dy to Co$\text{}_{20}$Cu$\text{}_{80}$ and optimal thermal treatment, the value of magnetoresistance ratio measured at 10 K in a field of 5 T increases from -14% to -28%. The effect can be attributed to the presence of clusters of hexagonal Dy(Co,Cu)$\text{}_{5}$, which was ascertained from X-ray diffraction data, or other, metastable rare-earth compounds and paramagnetic rare-earth atoms in the Cu matrix.
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 791-794
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Structures in Ultrathin Films and Nanostructures: Simulation
Autorzy:
Lévy, J.-C. S.
Ghazali, A.
Vedmedenko, E. Yu.
Powiązania:
https://bibliotekanauki.pl/articles/2013038.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Ak
75.50.Tt
75.60.Ch
75.40.Mg
Opis:
In magnetic ultrathin films and dots, competing exchange, anisotropy and dipolar couplings lead to a large variety of magnetic structures. These structures are obtained by means of the Monte Carlo simulations. Three classes of magnetic structures are obtained according to anisotropy-to-dipolar energy ratio: Ising striped structures, XY-spin structures with vortices, and twisted spin phases at the spin = reorientation transition. Domain wall nucleation and motion at the coercive field are also accessible.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 431-434
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Composites Consisting of High-T$\text{}_{c}$ Superconductor and Fine Magnetic Particles
Autorzy:
Timko, M.
Kopčanský, P.
Kováč, J.
Koneracká, M.
Plecháček, V.
Powiązania:
https://bibliotekanauki.pl/articles/2013009.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.Hs
75.50.Tt
Opis:
The composite systems as a mixture of fine magnetic particles of Fe$\text{}_{3}$O$\text{}_{4}$ and superconducting powder such as Bi$\text{}_{1.8}$Pb$\text{}_{0.2}$Sr$\text{}_{2}$Ca$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{10+x}$ were prepared. The influence of internal magnetic field (generated by magnetic particles) on the superconducting properties of prepared composites were studied as a function of concentration of magnetic particles and their magnetic state. The observed data both of the shielding and the Meissner effect were compared with corresponding linear combination of pure signals of magnetite and superconductor, respectively. The large differences were observed for demagnetized samples. It means that result must be discussed in the frame of the distribution of internal magnetic field created by the magnetic particles.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 389-392
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dopants in Semiconductors Studied by Perturbed Angular Correlation
Autorzy:
Bartels, J.
Lorenz, K.
Ruske, F.
Tessema, G.
Vianden, R.
Powiązania:
https://bibliotekanauki.pl/articles/2028909.pdf
Data publikacji:
2001-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Vv
61.72.Tt
81.40.Ef
76.80.+y
Opis:
The γ-γ perturbed angular correlation technique is a very powerful tool for the investigation of dopant incorporation and damage recovery after implantation in semiconductors. The basic principles of the technique will be introduced followed by a discussion of its strengths and limitations. Examples of its application will be given, ranging from cavities in silicon, effects of uniaxial stress on acceptor-donor pairs in silicon to damage recovery in nitride semiconductors like GaN.
Źródło:
Acta Physica Polonica A; 2001, 100, 5; 585-602
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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